os specific ctrl-z (#1420)

readline/readline.go

@@ -192,14 +192,7 @@ func (i *Instance) Readline() (string, error) {
 		case CharCtrlW:
 			buf.DeleteWord()
 		case CharCtrlZ:
-			if err := UnsetRawMode(fd, termios); err != nil {
-				return "", err
-			}
-
-			syscall.Kill(0, syscall.SIGSTOP)
-
-			// on resume...
-			return "", nil
+			return handleCharCtrlZ(fd, termios)
 		case CharEnter:
 			output := buf.String()
 			if output != "" {